Merge pull request #4 from sur5r/master

Add missing include and missing declaration

src/include/gotty/tty.h

@@ -28,5 +28,6 @@
 void configure_stdout(void);
 void restore_stdout(void);
 int connect_tty(void);
+void wait_for_tty_device(void);
 
 #endif

src/main.c

@@ -20,6 +20,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include "gotty/options.h"
 #include "gotty/tty.h"